My eye on the left side and cheek are twitching continuously then stop and start again .ls it normal it?

Have you ever had Bell's palsy or injury of the facial nerve on that side? If not, you're more likely experiencing hemifacial spasm which often has an unknown cause & occurs in older people. A neurologist is best to evaluate & advise you. Any appropriate testing such as EMG study or brain MRI will be ordered after the clinical assessment.